查询词典 perturbation

The resonant frequency fr was found to be indepen-dent of Am in the measured amplitude range. We considerthat the variation of fr with Ba is mainly contributed bythe diamagnetism of the specimen, and the motion of fluxlines in the specimen plays only a role of perturbation.

共振频率〓在振幅测量范围内未发现振幅效应，认为〓随磁场的变化主要是由于材料的抗磁性的贡献，内部的磁通线运动只起着一种微扰的作用。

Perturbation analysis is an efficient method to study DEDS, whitch requires the differentiability of the performance function.

摘要扰动分析是研究离散事件动态系统的有效方法，性能函数的可微性是应用该方法的前提条件之一。

In this paper, the theoretical model of CQI is described in an atom-diatom system in the condition of the molecular beam, based on the first-Born approximation of time dependent perturbation theory, taking into accounts the anisotropic Lennard-Jones interaction potentials. The method of observing and measuring correctly the differential interference angle is presented. The relation between differential and parameter, velocity is obtained. The relation of the integral interference angle and temperature is discussed.

文中利用一阶含时波恩近似和L-J相互作用势，建立了原子-双原子分子碰撞系统转动传能的量子干涉模型，描述了观察和测量微分干涉角的方法，得到了微分干涉角与碰撞半径和碰撞速度间的关系，同时也得到了积分干涉角和实验温度的关系。

We fit the anisotropic interaction potential based on the Murrell-Sorbie potential function for He-HCl system by applying the interaction energy data, which are calculated at the theoretical level of the single and double excitation coupled-cluster method with noniteractive perturbation treatment of triple excitation CCSD. The new potential model is compared with other potential models. The differential scattering cross sections for collisions between He atoms and HCl molecules are calculated by using CC (Close-Coupling) method. Furthermore, the changing regularity of the inelastic differential scattering cross sections is summed up.

根据在CCSD/aug-cc-pVQZ理论水平下计算的He-HCl相互作用能数据，作者采用Murrell-Sorbie势函数形式拟合了He原子与HCl分子相互作用的各向异性势，并与其它势模型进行了比较；然后采用公认的精确度较高的CC近似方法计算了He-HCl碰撞体系的微分散射截面，总结了非弹性微分散射截面的变化规律。

In final chapter, we will discuss a perturbation method to solve the one-dimension Fokker-Planck equation with a constant diffusion coefficient and time-dependent drift coefficient.

所以我们在论文最后介绍一种新的方法来处理某一种Fokker-Planck方程式，这个方法就是微扰近似法。

For the dynamic system of discrete coupled and nonlinear three phase voltage source PWM rectifier, the cycle switch average operator is introduced to transform the discrete system into continuous and the small signal perturbation method is used to transform the nonlinear system into linear, the small signal dynamic mathematical models are set up.

中文摘要：针对三相电压型PWM整流器这个离散的、耦合的、非线性的动态系统，引入开关周期平均算子将离散的系统变换为连续的系统，应用小信号扰动法将非线性的系统化解为线性的系统，进而分析系统的小信号动态数学模型。

For the dynamic system of discrete coupled and nonlinear three phase voltage source PWM rectifier, the cycle switch average operator is introduced to transform the discrete system into continuous andthe small signal perturbation method is used to transform the nonlinear system into linear, the small signal dynamic mathematical models are set up.

中文摘要：针对三相电压型PWM整流器这个离散的、耦合的、非线性的动态系统，引入开关周期平均算子将离散的系统变换为连续的系统，应用小信号扰动法将非线性的系统化解为线性的系统，进而分析系统的小信号动态数学模型。

We have gaven a method of the discretization of fuzzy clustering methods based on perturbation.

给出了一种基于摄动的模糊聚类的属性离散化方法。

Thus in this thesis, we will made a detailed introduction of our method--perturbation based on unitary transformation, and apply it to several models to investigate the Non-Markovian decoherence and disentanglement dynamics of dissipation two-state system.

本文中，我们介绍一种新的解析方法-基于幺正变换下的微扰理论，并且把此理论应用到具体的实验模型中，推导了耗散二能级系统非马尔可夫退相干和退纠缠动力学。

Based on an analysis of symmetry, the dispersion relations near the Δ valley in strained Si(subscript 1-x)Ge (0≤x.45)/(001),(111),(101) Si are derived using the KP method with perturbation theory.

基于对称性分析，应用KP微扰理论确定了应变Si(下标 1-x)Ge(0≤x.45)/(001)，(111)，(101)Si的Δ能谷附近的色散关系。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。